This is the list of "T" boats on the US Sailing inactive class boats.

Tahoe 18 Tri THO18X 75.0
Thai Mk 4 THAI-4 (75.0)
Tiger Cat TIGC 79.0 85.6 [81.5] [79.0] [72.7]
Topcat (1-up TOPC (88.0)
Trac 18 TRC18 67.5 73.2 70.3 67.5 62.1
TrailerTri 680 TRL680 [89.0]
TrailerTri 720 TRL720 [79.5]
Tramp TRMP (90.2) (89.9)
Tremolino Tri TRMLO (83.9) (85.0)
Tristar 18